Nightly Build - 8/23/2021 — Glaze 3D Steam update #637144

- implement dds loading for cubemap, 3d texture types - implement project file embedding for cubemap and 3d textures - Broad changes to texture handling. CPU-side data is kept concurrently with GPU-side data and updated along with it, allowing multi-threaded texture operations for textures. Mirroring texture data on both CPU/GPU sides allows texture access for both the CPU raytracer and GPU shaders. - change direct lighting from world space to view space for increased precision - add toggle for auto-conversion of textures at load time to 8-bit RGB values, which was previously the only option for loading. - several fixes to texture tools. See README.txt for more details.